Structural changes in nanocrystalline mackinawite (FeS) at high pressure
| Autor: | C. D. Martin, John B. Parise, Peter L. Lee, Lars Ehm, Sytle M. Antao, F. M. Michel, Sarvjit Shastri, Peter J. Chupas |
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| Rok vydání: | 2008 |
| Předmět: |
Phase transition
Materials science Pair distribution function Thermodynamics engineering.material General Biochemistry Genetics and Molecular Biology Grain size Nanocrystalline material Tetragonal crystal system Crystallography symbols.namesake Mackinawite engineering symbols Orthorhombic crystal system van der Waals force |
| Zdroj: | Journal of Applied Crystallography. 42:15-21 |
| ISSN: | 0021-8898 |
| Popis: | The high-pressure behavior of nanocrystalline mackinawite (FeS) with particle sizes of 6, 7 and 8 nm has been investigated by high-energy X-ray total scattering and pair distribution function analysis. An irreversible first-order structural phase transition from tetragonal mackinawite to orthorhombic FeS-II was observed at about 3 GPa. The transition is induced by the closure of the van der Waals gap in the layered mackinawite structure. A grain size effect on the transition pressure and the compressibility was observed. |
| Databáze: | OpenAIRE |
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